| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electric water heater system that can boil efficiently with minimum power distribution resources and causes no power source faults to other equipment and apparatuses by the operation of a master breaker even in the case of operating a plurality of electric water heaters at the same time. SOLUTION: This electric water heater system is provided with a plurality of electric water heaters, a plurality of relaying means connected with a commercial power source correspondingly to the electric water heaters to turn on or off power supply, a time-keeping means for measuring the ON time of the relaying means, a controlling means for controlling the relaying means, and an energization detecting means for detecting the energization of the electric water heaters. To a plurality of electric water heaters, the controlling means successively brings the relaying means to the ON state for a predetermined time to supply the power source to the predetermined electric water heater, thereby always supplying the power source to only one electric water heater. Moreover, the controlling means continues the ON state of the relaying means only during the detection of the energization of the electric water heaters by the energization detecting means at the time when the controlling means brings the relaying means to the ON state to supply the power source to the predetermined electric water heater.</p> |
